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/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
pygpgme - a Python wrapper for the gpgme library
Copyright (C) 2006 James Henstridge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <Python.h>
#include "pygpgme.h"
PyObject *pygpgme_error = NULL;
PyObject *
pygpgme_error_object(gpgme_error_t err)
{
char buf[256] = { '\0' };
PyObject *exc = NULL, *source = NULL, *code = NULL, *strerror = NULL;
if (err == GPG_ERR_NO_ERROR)
Py_RETURN_NONE;
if (!(source = PyInt_FromLong(gpgme_err_source(err))))
goto end;
if (!(code = PyInt_FromLong(gpgme_err_code(err))))
goto end;
/* get the error string */
if (gpgme_strerror_r(err, buf, sizeof(buf) - 1) != 0)
strcpy(buf, "Unknown");
if (!(strerror = PyUnicode_DecodeUTF8(buf, strlen(buf), "replace")))
goto end;
exc = PyObject_CallFunction(pygpgme_error, "OOO", source, code, strerror);
if (!exc)
goto end;
/* set the source and code as attributes of the exception object: */
PyObject_SetAttrString(exc, "source", source);
PyObject_SetAttrString(exc, "code", code);
PyObject_SetAttrString(exc, "strerror", strerror);
/* pygpgme 0.1 set the "message" attribute on exceptions, but
* Python 2.6 classes this exception attribute as deprecated (even
* though we weren't using it in the deprecated fashion).
*
* We now set the "strerror" attribute for this information, which
* is similar to IOError/OSError.
*
* For backward compatibility, we still set "message" on Python
* versions before 3.0. The hack below is to avoid issuing a
* deprecation warning.
*/
#if PY_VERSION_HEX < 0x03000000
# if PY_VERSION_HEX >= 0x02060000
{
PyBaseExceptionObject *base_exc = (PyBaseExceptionObject *)exc;
PyObject *old_message = base_exc->message;
Py_INCREF(strerror);
base_exc->message = strerror;
Py_XDECREF(old_message);
}
# else
PyObject_SetAttrString(exc, "message", strerror);
# endif
#endif
end:
Py_XDECREF(strerror);
Py_XDECREF(code);
Py_XDECREF(source);
return exc;
}
/* check whether the given gpgme_error_t value indicates an error. If so,
* raise an equivalent Python exception and return TRUE */
int
pygpgme_check_error(gpgme_error_t err)
{
PyObject *exc;
if (err == GPG_ERR_NO_ERROR)
return 0;
exc = pygpgme_error_object(err);
if (!exc)
return -1;
PyErr_SetObject(pygpgme_error, exc);
return -1;
}
gpgme_error_t
pygpgme_check_pyerror(void)
{
PyObject *err_type, *err_value, *err_traceback;
gpgme_error_t err;
PyObject *args = NULL, *source = NULL, *code = NULL;
if (!PyErr_Occurred())
return GPG_ERR_NO_ERROR;
PyErr_Fetch(&err_type, &err_value, &err_traceback);
PyErr_NormalizeException(&err_type, &err_value, &err_traceback);
err = gpgme_error(GPG_ERR_GENERAL);
/* get the first argument of the exception */
args = PyObject_GetAttrString(err_value, "args");
if (args == NULL)
goto end;
source = PyTuple_GetItem(args, 0);
if (source == NULL)
goto end;
if (PyErr_GivenExceptionMatches(err_type, pygpgme_error)) {
code = PyTuple_GetItem(args, 1);
if (code == NULL)
goto end;
if (PyInt_Check(source) && PyInt_Check(code))
err = gpgme_err_make(PyInt_AsLong(source), PyInt_AsLong(code));
} else if (PyErr_GivenExceptionMatches(err_type, PyExc_IOError) ||
PyErr_GivenExceptionMatches(err_type, PyExc_OSError)) {
if (PyInt_Check(source))
err = gpgme_err_code_from_errno(PyInt_AsLong(source));
}
end:
Py_XDECREF(err_type);
Py_XDECREF(err_value);
Py_XDECREF(err_traceback);
Py_XDECREF(args);
PyErr_Clear();
return err;
}
int
pygpgme_no_constructor(PyObject *self, PyObject *args, PyObject *kwargs)
{
PyErr_Format(PyExc_NotImplementedError,
"can not directly create instances of %s",
self->ob_type->tp_name);
return -1;
}
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